CN114193848A - Ultra-wide spectrum regulation and control double-layer fabric with ultrahigh reflectivity - Google Patents
Ultra-wide spectrum regulation and control double-layer fabric with ultrahigh reflectivity Download PDFInfo
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- CN114193848A CN114193848A CN202111348413.5A CN202111348413A CN114193848A CN 114193848 A CN114193848 A CN 114193848A CN 202111348413 A CN202111348413 A CN 202111348413A CN 114193848 A CN114193848 A CN 114193848A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/71—Resistive to light or to UV
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Abstract
The invention discloses an ultra-wide spectrum regulation double-layer fabric with ultra-high reflectivity, which comprises a visible light-near infrared high-reflection functional fiber fabric at the bottom layer and an ultraviolet high-reflection functional fabric at the top layer; the visible light-near infrared high reflection functional fiber fabric of the bottom layer adopts doped nano TiO2The inorganic particle visible light-near infrared high reflection composite material is prepared, and has high reflectivity in visible light-near infrared sunlight wave band; the ultraviolet high reflection functional fiber fabric of the top layer adopts doped nano-grade BaSO4Prepared from inorganic particles of ultraviolet-reflecting composite materialThe outer wave band has high reflectivity, and the ultraviolet protection level of UPF50+ is achieved. The ultra-wide spectrum regulating and controlling double-layer fabric with the ultrahigh reflectivity is obtained by assembling two layers of functional fabrics, so that the fabric has excellent high-reflection spectrum selection characteristics in the whole sunlight wave band.
Description
Technical Field
The invention relates to the technical field of light aging resistance, in particular to an ultra-wide spectrum regulation double-layer fabric with ultra-high reflectivity.
Background
With the development of science and technology, fabrics are widely used in the fields of human wear, construction, geotechnics, protection, sports, transportation, medical use, industrial use, military use, aerospace and the like. The fabric can be endowed with special protective properties such as electromagnetic radiation resistance, ultraviolet and infrared radiation resistance, static resistance, antibiosis, medical protection, thermal protection and the like through functional finishing. When the protective fabric is in a specific environment, the protective fabric can shield the interference of the change of external conditions to human bodies, thereby effectively protecting the physical health of people. During the processing, storage and use of the fiber polymer in the fabric, the fiber polymer is subjected to the comprehensive action of factors such as light, heat, oxygen, moisture and the like, and the performance is gradually deteriorated, so that the use value is finally lost, namely, the aging occurs. Light is one of the most prominent causes of aging of polymeric materials. The deterioration of the properties of the polymer material by light is called "photoaging". For the light protection problem of the fabric, the fabric is required to have effective protection on light and to be protected to enable the fabric to have stable functions. The direct reflection light protection mode is adopted, and the damage of light to human bodies and fabrics can be simultaneously solved.
The aluminum-plated cloth is a commonly used ultraviolet-resistant protective clothing material for field operators in geological and mineral industries. The transmissivity of ultraviolet to the aluminum-plated cloth is less than 1%, and the reflectivity can reach 80%. The transmission of the aluminized cloth to infrared rays is only 2%. Most of the heat in sunlight comes from infrared rays, so that the heat insulation effect can be generally obtained. However, the heavy weight and poor moisture permeability of the aluminum-plated cloth limit the development of the aluminum-plated cloth in the field of daily clothes, and the aluminum-plated cloth is more suitable for professional technicians in special working environments.
The gorgeous scene team researches the multifunctional warp-knitted metal film composite fabric, uses the warp-knitted polyester pigment printed fabric as a carrier, and utilizes a gluing composite device to firmly attach the transfer aluminum-plated titanium alloy film to the fabric, so as to obtain the fabric with the infrared ray and ultraviolet ray reflectivity of more than 90 percent and multiple functions of water resistance, moisture permeability, static electricity resistance, electromagnetic protection and the like. Although the method can realize selective reflection of a wide spectrum, the weight of the fabric is increased due to the incorporation of the metal film, and the daily wearing comfort is affected.
Another effective way to improve the reflectivity of fabrics is to coat the surface of the fabric with a highly reflective film, and many studies have been made on highly reflective films. Zhang adopts a sol-gel method to alternately deposit a high-refractive-index material ZrO on a glass substrate4And low refractive index material SiO2A 20-layer high-reflectivity film was prepared, which had a minimum transmission of 1% at a wavelength of 1064 nm. Yu adopts a sol-gel method to prepare TiO2The alternating deposition of colloids and polyelectrolytes on the optical fiber and microscope slides produced a 24-layer high-reflectivity film with a 20% reduction in transmission at 850 nm. Cecchetto prepared a two-layer film on aluminum substrate by combining anodization and sol-gel deposition, and the results showed a great improvement in the reflectivity of the film. The above methods all have the defects of difficult adhesion and combination of the film and the fabric, no support of water washing and the like.
In recent years, nano inorganic oxides such as ZnO and TiO2Is widely used as an inorganic ultraviolet shielding agent. However, it was found that ZnO and TiO are present in nano-and submicron-sized2Has strong absorption effect on ultraviolet rays. The functional mechanism of the compounds as the ultraviolet screening agent mainly comes from the ultraviolet absorption performance, the scattering reflection plays a small role and is mainly shown in a long-wave ultraviolet region with weak absorption and no absorption. Although these inorganic uv screeners can achieve a reduction in uv transmission by absorbing uv light, the absorbed uv light is converted to thermal or other energy, and can also damage the material itself to some extent. Because the selective reflection performance of inorganic functional substances selected by the reflecting agent in a visible light-near infrared spectrum region is not strong, and the absorption of an ultraviolet light wave band is large, the prepared high-reflectivity fabric is difficult to obtain a relatively ideal wide wave band reflection effect under the sunlight illumination condition.
In summary, the existing high-reflection clothing material technology mostly uses coatings or films, and is difficult to achieve better balance in the aspects of air permeability, comfort, economy and the like; common inorganic functional substances such as nano-scale titanium dioxide, zinc oxide and the like with reflecting particles have poor selective reflection performance in a visible light-near infrared spectrum region and large absorption of an ultraviolet light wave band, and the prepared reflecting fabric has difficulty in obtaining a relatively ideal wide wave band reflecting effect under the condition of sunlight illumination.
Disclosure of Invention
Aiming at the problems of poor spectrum selection performance, complex preparation method, high cost and the like in the prior art, the invention uses nano-grade TiO2The doped visible light-near infrared high reflection functional fiber fabric is used as a bottom layer, and BaSO is used as a base layer4The doped ultraviolet high-reflection functional fabric is used as a top layer to construct a double-layer fabric structure, and solar radiation is reflected in a multi-stage manner, so that the sunlight blocking performance of the material is improved. The ultra-wide spectrum regulating and controlling double-layer fabric with the ultra-high reflectivity has excellent wide-spectrum high-reflectivity performance and good mechanical performance, and the fabric suitable for clothes can be prepared by adopting the fiber fabric.
The invention is realized by adopting the following technical scheme:
an ultra-wide spectrum regulation double-layer fabric with ultra-high reflectivity comprises a visible light-near infrared high-reflection functional fiber fabric at the bottom layer and an ultraviolet high-reflection functional fabric at the top layer; the visible light-near infrared high reflection functional fiber fabric of the bottom layer adopts doped nano TiO2The inorganic particle visible light-near infrared high reflection composite material is prepared, and has high reflectivity in visible light-near infrared sunlight wave band; the ultraviolet high reflection functional fiber fabric of the top layer adopts doped nano-grade BaSO4The ultraviolet high-reflection composite material of the inorganic particles is prepared, has high reflectivity in an ultraviolet band, and reaches the ultraviolet protection level of UPF50 +.
In the above technical solution, preferably, the preparation method of the visible light-near infrared high reflection functional fiber fabric is: the visible light-near infrared high reflection fiber is obtained by spinning a visible light-near infrared high reflection composite material prepared by a hot-drawing method or a melt extrusion method. The parameters of the hot-drawing method or the melt extrusion method are set to be within the temperature range of 25-600 ℃, the tension is 0-500g, and the fiber drawing speed is 0.1-5000 m/min.
Preferably, the visible light-near redThe external high-reflection composite material is made up by mixing nano-grade TiO2The inorganic particles and the polymer base material are uniformly compounded through a chemical dissolution mixing and/or physical blending step.
Preferably, the nano-sized TiO2The particle size range of the inorganic particles is 200-800 nm.
Preferably, the visible light-near infrared high reflection composite material contains nanoscale TiO2The doping concentration of the inorganic particles is 5 vol.% to 15 vol.%.
Preferably, the polymer base material of the visible light-near infrared high reflection composite material is a thermoplastic material, comprising: at least one or more of polyethylene, polypropylene, polyamide, polystyrene, polyacetic acid, polyurethane, etc.
Preferably, the preparation method of the ultraviolet high-reflection functional fiber fabric comprises the following steps: is prepared by weaving ultraviolet high-reflection functional fibers prepared from an ultraviolet high-reflection composite material by a hot-drawing method or a melt extrusion method. The parameters of the hot-drawing method or the melt extrusion method are set to be within the temperature range of 25-600 ℃, the tension is 0-500g, and the fiber drawing speed is 0.1-5000 m/min.
Preferably, the ultraviolet high-reflection composite material is nano-scale BaSO4The inorganic particles and the polymer base material are uniformly compounded through a chemical dissolution mixing and/or physical blending step.
Preferably, the nanoscale BaSO4The particle size range of the inorganic particles is 400-800 nm.
Preferably, the nano-scale BaSO in the ultraviolet high-reflection composite material4The doping concentration of the inorganic particles is 10 vol.% to 25 vol.%.
Preferably, the polymer base material of the ultraviolet high reflection composite material is a thermoplastic material, and comprises: at least one or more of polyethylene, polypropylene, polyamide, polystyrene, polylactic acid, polyurethane, and the like.
Preferably, the visible light-near infrared high reflection functional fiber fabric of the bottom layer and the ultraviolet high reflection functional fabric of the top layer are fixed by adopting a sewing method.
The preparation method of the ultra-wide spectrum regulation double-layer fabric with the ultra-high reflectivity comprises the following steps:
(1) preparing a visible light-near infrared high-reflection composite material and an ultraviolet high-reflection composite material;
(2) preparing visible light-near infrared high reflection functional fiber and ultraviolet high reflection functional fiber by using a hot-drawing method or a melt extrusion method;
(3) weaving to obtain visible light-near infrared high reflection functional fabric and ultraviolet high reflection functional fabric;
(4) the visible light-near infrared high reflection functional fabric is arranged on the bottom layer, the ultraviolet high reflection functional fabric is arranged on the top layer, and the visible light-near infrared high reflection functional fabric and the ultraviolet high reflection functional fabric are assembled and fixed to obtain the ultra-wide spectrum regulation double-layer fabric with the ultra-high reflectivity.
By the technical scheme, the technical scheme provided by the invention at least has the following advantages:
according to the invention, through the comprehensive application of material design and structural design, the spectrums of materials with different functional characteristics are superposed and combined, and the spectrum selection characteristic is optimized; and the designer can complete the corresponding functional fabric design according to the target requirement.
The visible light-near infrared high reflection functional fabric is prepared by introducing high-concentration nano TiO2The micro-nano particles are doped, and the high reflectivity is realized in a visible light-near infrared band.
The ultraviolet high-reflection functional fabric is prepared by introducing nano-scale BaSO4The micro-nano particles are doped, the reflectivity is high in an ultraviolet band, the ultraviolet protection level of UPF50+ is achieved, and the structure can effectively avoid damage of ultraviolet transmittance on the material caused by ultraviolet absorption in the prior art.
The preparation process is simple, can realize large-area production, and has great significance in the field of light aging resistance.
Drawings
Fig. 1 is a diagram of a super-wide spectrum control double-layer fabric with ultra-high reflectivity according to embodiment 1 of the present invention;
fig. 2 is a real object diagram of a visible light-near infrared high reflection functional fabric provided in embodiment 1 of the present invention;
fig. 3 is a reflection rate curve of the ultra-wide spectrum control double-layer fabric with ultra-high reflectivity in the solar wavelength band, provided by embodiment 1 of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The ultra-wide spectrum regulation double-layer fabric with the ultra-high reflectivity comprises a bottom visible light-near infrared high-reflection functional fabric and a top ultraviolet high-reflection functional fabric, wherein the bottom visible light-near infrared high-reflection functional fabric adopts doped nano-TiO2Preparing a visible light-near infrared high-reflection composite material of inorganic particles; the ultraviolet high reflection functional fiber fabric of the top layer adopts doped nano-grade BaSO4The ultraviolet high-reflection composite material of inorganic particles is prepared. According to the invention, the spectrum superposition of different functional materials enables the fabric to have excellent high-reflection spectrum selection characteristics in the whole sunlight wave band. The preparation process is simple, can realize large-area production, and has great significance in the field of light aging resistance.
The visible light-near infrared high reflection composite material is prepared by mixing nano-grade TiO2The inorganic particles and the polymer base material are uniformly compounded through a chemical dissolution mixing and/or physical blending step.
The nano-scale TiO2The particle diameter of the inorganic particles is in the range of 400-600nm, more preferably 600 nm.
Nanoscale TiO in the visible light-near infrared high-reflection composite material2The doping concentration of the inorganic particles is 5 vol.% to 15 vol.%, and more preferably 15 vol.%.
The polymer substrate material of the visible light-near infrared high reflection composite material is a thermoplastic material, and comprises: at least one or a mixture of at least one of polyethylene, polypropylene, polyamide, polystyrene, polylactic acid, polyurethane, and the like, and polyethylene and polylactic acid are more preferable.
The preparation method of the visible light-near infrared high reflection functional fiber fabric comprises the following steps: the visible light-near infrared high reflection fiber is obtained by spinning a visible light-near infrared high reflection composite material prepared by a hot-drawing method or a melt extrusion method.
The parameters of the hot-drawing method or the melt extrusion method are set to be within the temperature range of 25-600 ℃, the tension is 0-500g, and the fiber drawing speed is 0.1-5000 m/min. Specifically, the tension/pressure range is 0 to 500g, and the preferred fiber draw tension range is 10 to 50 g; the fiber preparation speed range is 0.1-5000m/min, and the preferable fiber preparation speed range is 0.1-20 m/min. The diameter of the visible light-near infrared high reflection functional fiber finally obtained by the method can be regulated and controlled to be 3nm-20000 mu m, and the preferable fiber diameter is 200 mu m-800 mu m, and is further preferable to be 500 mu m.
Specifically, the preparation method of the visible light-near infrared high reflection functional fiber fabric is at least one of warp knitting, weft knitting, shuttle knitting and the like, and the weave structure of the visible light-near infrared high reflection composite fiber fabric is at least one or more of plain weave, twill, satin, jacquard and the like.
The ultraviolet high-reflection composite material is prepared by mixing nanoscale BaSO4The inorganic particles and the polymer base material are uniformly compounded through a chemical dissolution mixing and/or physical blending step.
The nano-scale BaSO4The particle diameter of the inorganic particles is in the range of 400-800nm, and more preferably 550 nm.
Nanoscale BaSO in the ultraviolet high-reflection composite material4The doping concentration of the inorganic particles is 10 vol.% to 25 vol.%, and more preferably 10 vol.%.
The polymer substrate material of the ultraviolet high-reflection composite material is a thermoplastic material and comprises: at least one or a mixture of at least one of polyethylene, polypropylene, polyamide, polystyrene, polyacetic acid, polyurethane, etc., and more preferably polyethylene and polylactic acid.
The preparation method of the ultraviolet high-reflection functional fiber fabric is obtained by weaving ultraviolet high-reflection functional fibers prepared from an ultraviolet high-reflection composite material by a hot-drawing method or a melt extrusion method. The parameters of the hot-drawing method or the melt extrusion method are set to be 25-600 ℃, the tension/pressure is 0-500g, and the fiber preparation speed is 0.1-5000 m/min. Specifically, the tension/pressure range is 0-500g, and the preferred fiber drawing tension range is 10-50 g; the fiber preparation speed range is 0.1-5000m/min, and the preferable fiber preparation speed range is 0.1-20 m/min. The diameter of the ultraviolet high reflection functional fiber finally obtained by the method can be regulated and controlled to be 3nm-20000 μm, and the preferable fiber diameter is 200 μm-800 μm, and is further preferable to be 500 μm.
Specifically, the preparation method of the ultraviolet high-reflection functional fiber fabric is at least one of warp knitting, weft knitting, shuttle knitting and the like, and the weave structure of the ultraviolet high-reflection functional fiber fabric is at least one or more of plain weave, twill, satin, jacquard and the like.
In one embodiment, the method for fixing the visible light-near infrared high reflection functional fiber fabric at the bottom layer and the ultraviolet high reflection functional fabric at the top layer is sewing.
The preparation method of the ultra-wide spectrum regulation double-layer fabric with the ultra-high reflectivity comprises the following steps:
(1) preparing a visible light-near infrared high-reflection composite material and an ultraviolet high-reflection composite material;
(2) preparing visible light-near infrared high reflection functional fiber and ultraviolet high reflection functional fiber by using a hot-drawing method or a melt extrusion method;
(3) weaving to obtain visible light-near infrared high reflection functional fabric and ultraviolet high reflection functional fabric;
(4) the visible light-near infrared high reflection functional fabric is arranged on the bottom layer, the ultraviolet high reflection functional fabric is arranged on the top layer, and the visible light-near infrared high reflection functional fabric and the ultraviolet high reflection functional fabric are assembled and fixed to obtain the ultra-wide spectrum regulation double-layer fabric with the ultra-high reflectivity.
Example 1:
in the embodiment, the ultra-wide spectrum regulation double-layer fabric with the ultra-high reflectivity has excellent wide spectrum reflection performance and is suitable for radiation cooling of the surface of human skin.
Wherein, the polymer substrate material of the bottom layer visible light-near infrared high reflection functional fabric is polylactic acid (PLA), and doped nano TiO2The average particle size of the inorganic particles is about 600nm, and accounts for 15 percent of the total volume of the visible light-near infrared high-reflection composite material; the polymer substrate material of the top layer ultraviolet high reflection functional fabric is polylactic acid (PLA) and doped nano-scale BaSO4The average particle diameter of the inorganic particles is about 550nm, and accounts for 10% of the total volume of the ultraviolet high-reflection composite material.
The scheme for regulating and controlling the double-layer fabric by the ultra-wide spectrum with the ultra-high reflectivity provided by the embodiment comprises the following steps: the design of the visible light-near infrared high-reflection composite material and the design of the ultraviolet high-reflection composite material, and the ultra-wide spectrum regulation double-layer fabric with ultra-high reflectivity is manufactured by assembling the visible light-near infrared high-reflection functional fabric and the ultraviolet high-reflection functional fabric.
The design of the visible light-near infrared high reflection composite material specifically comprises the following materials (1): selecting polylactic acid (PLA) as a polymer base material (2) for particle size selection: the average particle size of the titanium dioxide particles is selected to be 600nm (3) concentration ratio: the titanium dioxide particles account for 15 vol% of the total volume of the composite material (4): and after chemical dissolution and uniform mixing, removing the solvent.
The design of the ultraviolet high-reflection composite material specifically comprises the following materials (1) in parts by weight: selecting polylactic acid (PLA) as a polymer base material (2) for particle size selection: the average particle size of barium sulfate particles is 550nm (3) concentration ratio: the barium sulfate particles account for 10 vol% of the total volume fraction of the composite material (4): and after chemical dissolution and uniform mixing, removing the solvent.
The obtained visible light-near infrared high reflection functional fabric (figure 2) and ultraviolet high reflection functional fabric are fixedly assembled by adopting a sewing method, as shown in figure 1. According to the test, as shown in fig. 3, the average reflectivity of the fabric in the solar wave band, namely the wave band of 0.3-2.5 μm, is 94%.
Example 2:
in this embodiment, the polymer substrate material of the bottom layer visible light-near infrared high reflection functional fabric is polylactic acid (PLA), doped nano-grade TiO2The average particle size of the inorganic particles is about 600nm and accounts for 30 percent of the total volume of the visible light-near infrared high-reflection composite material; the material composition of the top layer ultraviolet high reflection functional fabric is the same as that of the example 1.
The reflection performance of the ultra-wide spectrum regulation double-layer fabrics with ultra-high reflectivity in the embodiments 1 and 2 is compared, and the fabric TiO obtained in the embodiment 22The doping amount and the reflectivity in the visible light radiation band are higher than those of the fabric in the embodiment 1, so that the increase of the concentration of the doped titanium dioxide particles in the fiber can be judged to improve the reflectivity in the visible light band, thereby blocking the input of solar energy to the maximum extent. However, higher doping concentrations degrade the mechanical properties of the textile fibers, and a titanium dioxide doping concentration of 10 vol% is preferred under equilibrium considerations.
Example 3:
in this embodiment, the material composition of the bottom layer visible light-near infrared high reflection functional fabric is the same as that of embodiment 1; the material composition of the top layer ultraviolet high reflection functional fabric is the same as that of the example 1; the polymer substrate material of the top layer ultraviolet high reflection functional fabric is polylactic acid (PLA) doped with nano-scale BaSO4The average particle diameter of the inorganic particles is about 550nm, and accounts for 20% of the total volume of the ultraviolet high-reflection composite material.
The reflection performance of the ultra-wide spectrum control double-layer fabrics with ultra-high reflectivity in the embodiments 1 and 3 is compared, and the fabric TiO obtained in the embodiment 32The doping amount and the reflectivity in the ultraviolet radiation wave band are higher than those of the fabric in the embodiment 1, so that the reflectivity of the visible light wave band can be improved by judging the increase of the concentration of the doped barium sulfate particles in the fiber, and the input of solar energy can be blocked to the maximum extent. However, the mechanical properties of the textile fiber are deteriorated due to the doping with higher concentration, and the improvement of the ultraviolet reflection is not obvious, and the doping concentration of the barium sulfate with 10 vol% is preferred under the equilibrium consideration.
Comparative example 1:
in this comparative example, a single layer of visible-near infrared highly reflective functional fabric was provided, without the ultraviolet highly reflective layer.
The components of the visible light-near infrared high reflection functional fabric material are the same as those of the embodiment 1.
The reflection performance of the fabric in the embodiment 1 is compared with that of the fabric in the comparative example 1, and the fabric in the comparative example 1 is influenced by ultraviolet absorption, the average reflection rate of the fabric in the sunlight wave band, namely the wave band of 0.3-2.5 mu m, is only 88%, and the fact that the wide-spectrum reflection performance of the fabric can be optimized by adding the ultraviolet high-reflection layer is proved.
Comparative example 2:
in this comparative example, a commercial aluminized cloth was provided.
The reflection performance of the example 1 is compared with that of the comparative example 1, and the reflectivity of the ultra-wide spectrum regulation double-layer fabric with the ultra-high reflectivity is greatly superior to that of the aluminum-plated cloth in a sunlight wave band of 0.3-2.5 mu m. In addition, the ultra-wide spectrum regulation double-layer fabric with ultra-high reflectivity is much lighter than aluminum-plated cloth, can be woven and is more suitable for daily clothes.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. The ultra-wide spectrum regulation double-layer fabric with the ultra-high reflectivity is characterized by comprising a visible light-near infrared high-reflection functional fiber fabric at the bottom layer and an ultraviolet high-reflection functional fabric at the top layer; the visible light-near infrared high reflection functional fiber fabric of the bottom layer adopts doped nano TiO2Preparing a visible light-near infrared high-reflection composite material of inorganic particles; the ultraviolet high reflection functional fiber fabric of the top layer adopts doped nano-grade BaSO4Preparing an ultraviolet high-reflection composite material of inorganic particles;
nanoscale TiO in the visible light-near infrared high-reflection composite material2The doping concentration of the inorganic particles is 5-15 vol.%; nanoscale BaSO in the ultraviolet high-reflection composite material4The doping concentration of the inorganic particles is 10 vol.% to 25 vol.%.
2. The ultra-high reflectivity ultra-wide spectrum regulating double-layer fabric as claimed in claim 1, wherein: the visible light-near infrared high reflection composite material is prepared by mixing nano-grade TiO2The inorganic particles and the polymer base material are uniformly compounded through a chemical dissolution mixing and/or physical blending step.
3. The ultra-high reflectivity ultra-wide spectrum regulating double-layer fabric as claimed in claim 1, wherein: the nano-scale TiO2The particle size range of the inorganic particles is 200-800 nm.
4. The ultra-high reflectivity ultra-wide spectrum regulating double-layer fabric as claimed in claim 2, wherein: the polymer substrate material of the visible light-near infrared high reflection composite material is a thermoplastic material, and comprises: at least one or a mixture of more than one of polyethylene, polypropylene, polyamide, polystyrene, polyacetic acid and polyurethane.
5. The ultra-high reflectivity ultra-wide spectrum regulating double-layer fabric as claimed in claim 1, wherein: the ultraviolet high-reflection composite material is prepared by mixing nanoscale BaSO4The inorganic particles and the polymer base material are uniformly compounded through a chemical dissolution mixing and/or physical blending step.
6. The ultra-high reflectivity ultra-wide spectrum regulating double-layer fabric as claimed in claim 1, wherein: the nano-scale BaSO4The particle size range of the inorganic particles is 400-800 nm.
7. The ultra-high reflectivity ultra-wide spectrum regulating double-layer fabric as claimed in claim 5, wherein: the polymer substrate material of the ultraviolet high-reflection composite material is a thermoplastic material and comprises: at least one or more than one mixture of polyethylene, polypropylene, polyamide, polystyrene, polylactic acid and polyurethane.
8. The ultra-wide spectrum regulating and controlling double-layer fabric with ultra-high reflectivity as claimed in claim 1, wherein the visible light-near infrared high reflection functional fiber fabric of the bottom layer and the ultraviolet high reflection functional fabric of the top layer are fixed by a sewing method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111348413.5A CN114193848B (en) | 2021-11-15 | 2021-11-15 | Ultra-wide spectrum regulation and control double-layer fabric with ultrahigh reflectivity |
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| CN114606761A (en) * | 2022-03-22 | 2022-06-10 | 武汉纺织大学 | Long-acting light aging resistant fiber material and preparation method thereof |
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| CN114606761B (en) * | 2022-03-22 | 2024-06-11 | 武汉纺织大学 | Long-acting photo-aging resistant fiber material and preparation method thereof |
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| CN114193848B (en) | 2023-03-21 |
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